Here’s the statement that zdnet.com received from a Microsoft mobile spokesperson via e-mail:
“For Windows Phone 7 Series we are enforcing a strict set of hardware requirements to ensure a consistently great experience for end-users and developers. While we cannot confirm that WM6.X phones that satisfy those requirements will be upgradeable, every Windows Phone 7 Series device will be upgradeable with improvements and features we deliver with subsequent Windows Phone 7 Series releases. We currently do not have plans to update the HTC HD2 to Windows Phone 7 Series.”
So there you have it. Windows Mobile 6.x devices are not going to be able to meet the new stricter Windows Phone 7 chassis specs to which Microsoft is holding phone makers.